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Diffstat (limited to 'Build/source/texk/dvisvgm/dvisvgm-src/src/XXHashFunction.hpp')
-rw-r--r-- | Build/source/texk/dvisvgm/dvisvgm-src/src/XXHashFunction.hpp | 118 |
1 files changed, 0 insertions, 118 deletions
diff --git a/Build/source/texk/dvisvgm/dvisvgm-src/src/XXHashFunction.hpp b/Build/source/texk/dvisvgm/dvisvgm-src/src/XXHashFunction.hpp deleted file mode 100644 index 4478a2204cf..00000000000 --- a/Build/source/texk/dvisvgm/dvisvgm-src/src/XXHashFunction.hpp +++ /dev/null @@ -1,118 +0,0 @@ -/************************************************************************* -** XXHashFunction.hpp ** -** ** -** This file is part of dvisvgm -- a fast DVI to SVG converter ** -** Copyright (C) 2005-2021 Martin Gieseking <martin.gieseking@uos.de> ** -** ** -** This program is free software; you can redistribute it and/or ** -** modify it under the terms of the GNU General Public License as ** -** published by the Free Software Foundation; either version 3 of ** -** the License, or (at your option) any later version. ** -** ** -** This program is distributed in the hope that it will be useful, but ** -** WITHOUT ANY WARRANTY; without even the implied warranty of ** -** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ** -** GNU General Public License for more details. ** -** ** -** You should have received a copy of the GNU General Public License ** -** along with this program; if not, see <http://www.gnu.org/licenses/>. ** -*************************************************************************/ - -#ifndef XXHASHFUNCTION_HPP -#define XXHASHFUNCTION_HPP - -#include <xxhash.h> -#include "HashFunction.hpp" -#include "utility.hpp" - -#if (XXH_VERSION_NUMBER >= 701) && defined(XXH3_SECRET_SIZE_MIN) -#define ENABLE_XXH128 -#endif - -template <int HASH_SIZE> -struct XXHInterface { -}; - -template<> -struct XXHInterface<4> { - using State = XXH32_state_t; - using Digest = XXH32_hash_t; - static constexpr auto createState = &XXH32_createState; - static constexpr auto freeState = &XXH32_freeState; - static constexpr auto reset = &XXH32_reset; - static constexpr auto update = &XXH32_update; - static constexpr auto digest = &XXH32_digest; -}; - -template<> -struct XXHInterface<8> { - using State = XXH64_state_t; - using Digest = XXH64_hash_t; - static constexpr auto createState = &XXH64_createState; - static constexpr auto freeState = &XXH64_freeState; - static constexpr auto reset = &XXH64_reset; - static constexpr auto update = &XXH64_update; - static constexpr auto digest = &XXH64_digest; -}; - -#ifdef ENABLE_XXH128 -template<> -struct XXHInterface<16> { - using State = XXH3_state_t; - using Digest = XXH128_hash_t; - static constexpr auto createState = &XXH3_createState; - static constexpr auto freeState = &XXH3_freeState; - static constexpr auto reset = &XXH3_128bits_reset_withSeed; - static constexpr auto update = &XXH3_128bits_update; - static constexpr auto digest = &XXH3_128bits_digest; -}; -#endif - -/** Implements the HashFunction class for the xxHash algorithms. */ -template <int HASH_BYTES> -class XXHashFunction : public HashFunction { - using Interface = XXHInterface<HASH_BYTES>; - public: - XXHashFunction () : _state(Interface::createState()) {Interface::reset(_state, 0);} - XXHashFunction (const char *data, size_t length) : XXHashFunction() {update(data, length);} - explicit XXHashFunction(const std::string &data) : XXHashFunction() {update(data);} - explicit XXHashFunction(const std::vector<uint8_t> &data) : XXHashFunction() {update(data);} - ~XXHashFunction () override {Interface::freeState(_state);} - int digestSize () const override {return HASH_BYTES;} - void reset () override {Interface::reset(_state, 0);} - void update (const char *data, size_t length) override {Interface::update(_state, data, length);} - void update (const std::string &data) override {update(data.data(), data.length());} - void update (const std::vector<uint8_t> &data) override {update(reinterpret_cast<const char*>(data.data()), data.size());} - - using HashFunction::update; // unhide update(istream &is) defined in base class - - std::vector<uint8_t> digestBytes () const override { - return util::bytes(Interface::digest(_state), HASH_BYTES); - } - - typename Interface::Digest digestValue () const {return Interface::digest(_state);} - static unsigned version () {return XXH_versionNumber();} - - private: - typename Interface::State *_state; -}; - -using XXH32HashFunction = XXHashFunction<4>; -using XXH64HashFunction = XXHashFunction<8>; - -#ifdef ENABLE_XXH128 -using XXH128HashFunction = XXHashFunction<16>; - -template<> -inline std::vector<uint8_t> XXHashFunction<16>::digestBytes () const { - std::vector<uint8_t> hash; - auto digest = Interface::digest(_state); - for (auto chunk : {digest.high64, digest.low64}) { - auto bytes = util::bytes(chunk); - hash.insert(hash.end(), bytes.begin(), bytes.end()); - } - return hash; -} -#endif - -#endif |